On Sat, 17 Sep 2011 09:49:01 -0700 (PDT), Alyson
wrote:

What type of metal rod/strip could I insert in a pad that could then
be molded to fit a knee without breaking when bent and unbent
repeatedly?

A hinged type.

Nexxxxxxxxxt!

--
Shake off all the fears of servile prejudices, under which weak minds
are servilely crouched. Fix reason firmly in her seat, and call on her
tribunal for every fact, every opinion. Question with boldness even the
existence of a God; because, if there be one, he must more approve of
the homage of reason than that of blindfolded fear.
-- Thomas Jefferson